The solubility of NaCl(s) in water at 298 K is about 6 moles per litre. Suppose you add 1 mole of Na — Thermodynamics and Thermochemistry Chemistry Question

💡 Solution & Explanation

Since 1 mole is well below the 6 M solubility limit, it will dissolve spontaneously, making $\Delta G < 0$. The dissolution of a solid salt into mobile aqueous ions drastically increases disorder, meaning $\Delta S > 0$.